Facebook-branded Vitaminwater

Those smug smarties from Palo Alto, Calif. (disclosure: my husband works there part-time, so I can say that with some bit of certainty) say they love the openness and cooperativeness of internal Facebook culture, according to Glassdoor (as well as the free food and commuter shuttles).

This is the first time Facebook has made the Glassdoor list. In second place is Southwest Airlines–which was last year’s winner–followed by Bain & Company, General Mills and Edelman, respectively.

As for other tech companies, SAS Institute placed No. 7, Overstock.com was No. 9 and CareerBuilder No. 11. Apple was No. 20 and Google No. 30.

Meanwhile, in more surprising news, Glassdoor reports that Yahoo CEO Carol Bartz is actually more popular now than founder Jerry Yang when he was in the top spot. Bartz has an employee approval rating of 56 percent, compared to 34 percent for Yang when he left.

Other comparisons: HP CEO Léo Apotheker has 62 percent approval, compared to Mark Hurd’s 34 percent when he left, and AOL CEO Tim Armstrong has 71 percent approval, compared to Randy Falco’s 13 percent approval when he left.

The most popular tech CEO is Apple’s Steve Jobs, with a 97 percent approval rating. Facebook’s Mark Zuckerberg and Google’s Eric Schmidt are both at 96 percent.

Please see the disclosure about Facebook in my ethics statement.